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🛡️ CVE-2025-71306 — kernel

🟠 CVSS 7.1 — High ✅ No Known Exploit NVD
7.1
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

ima: Fix stack-out-of-bounds in is_bprm_creds_for_exec()

In the Linux kernel, the following vulnerability has been resolved:

ima: Fix stack-out-of-bounds in is_bprm_creds_for_exec()

KASAN reported a stack-out-of-bounds access in ima_appraise_measurement

from is_bprm_creds_for_exec:

BUG: KASAN: stack-out-of-bounds in ima_appraise_measurement+0x12dc/0x16a0

Read of size 1 at addr ffffc9000160f940 by task sudo/550

The buggy address belongs to stack of task sudo/550

and is located at offset 24 in frame:

ima_appraise_measurement+0x0/0x16a0

This frame has 2 objects:

[48, 56) 'file'

[80, 148) 'hash'

This is caused by using container_of on the *file pointer. This offset

calculation is what triggers the stack-out-of-bounds error.

In order to fix this, pass in a bprm_is_check boolean which can be set

depending on how process_measurement is called. If the caller has a

linux_binprm pointer and the function is BPRM_CHECK we can determine

is_check and set it then. Otherwise set it to false.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Unchanged — the damage stays inside the vulnerable component.
  • Confidentiality impact: High — total loss, or loss the attacker controls.
  • Integrity impact: None.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2025-71306 is recorded against 2 packages.

  • kernel (from 6.14.0 up to 6.19.4)
  • linux-kernel (from 6.14 up to 6.19.4)

Timeline and source

Published on 27 May 2026 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2025-71306 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.1
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2026-05-27
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.14.0 6.19.4
linux-kernel 6.14 6.19.4

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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